Successfully complete Mission 3, where you unlock the Rabbid in the controller. Select the "Manage Figurines" option, then enter one of the following codes to activate the corresponding cheat function:

Assassin Rabbid

Hold C + Z and press 2 two times, 1 two times, A two times, 1 two times to unlock the Assassin Rabbid.

Best Buy Geek Squad Rabbid

Hold C + Z and press A two times, 1 four times, 2 two times to unlock the Best Buy Geek Squad Rabbid.

Hold C + Z and press 1, 2, 1, 2, 1, 2, A two times to unlock the Prince Of Persia Rabbid.

Splinter Cell Rabbid

Hold C + Z and press B four times, A four times to unlock the Splinter Cell Rabbid.

TMNT Leonardo Rabbid

Hold C + Z and press 1 two times, 2 two times, A two times, 1 two times to unlock the TMNT Leonardo Rabbid.

Chuck Norris reference

In the "High Stakes Steak" level, go down the stairs where the first blow Rabbid is located. Enter the room with a pipe and two orange Verminators guarding it. You can find a picture of Chuck Norris on the right wall.